A 3.2 V-15 dBm Adaptive Threshold-Voltage Compensated RF Energy Harvester in 130 nm CMOS
A 3.2 V-15 dBm Adaptive Threshold-Voltage Compensated RF Energy Harvester in 130 nm CMOS
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DOI：
10.1109/tcsi.2015.2413153
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发表时间：
2015-04-01
影响因子：
5.1
通讯作者：
Moez, Kambiz
中科院分区：
文献类型：
--
作者：
Hameed, Zohaib;Moez, Kambiz
本文提出了一种自适应RF-DC功率转换器，该功率转换器利用辅助晶体管来动态地控制主整流链中的晶体管的阈值电压，从而有效地将RF信号转换为DC电压。所提出的电路被动地降低正向偏置晶体管的阈值电压，以增加收获的功率和输出电压，并增加反向偏置晶体管的阈值电压，以减少泄漏电流，以防止先前存储的能量的损失。一个12级自适应阈值补偿整流器的设计和实现在IBM的0.13 μ m CMOS工艺。建议的整流器具有测量的最大功率转换效率（PCE）为32%，在-15 dBm（32 μ W）的输入功率，同时提供3.2 V的1 M负载。对于1 M Ω负载，在-20.5 dBm（8.9 μ W）的极低输入功率下，整流器产生1 V的输出电压。
This paper presents an adaptive RF-DC power converter designed to efficiently convert RF signals to DC voltages utilizing auxiliary transistors to control the threshold voltage of the transistors in the main rectifier chain dynamically. The proposed circuit passively reduces the threshold voltage of the forward-biased transistors to increase the harvested power and the output voltage and increases the threshold voltage of the reverse-biased transistors to reduce the leakage current to prevent the loss of previously stored energy. A 12-stage adaptive threshold-compensated rectifier is designed and implemented in IBM's 0.13 mu m CMOS technology. The proposed rectifier exhibits measured maximum power conversion efficiency (PCE) of 32% at - 15 dBm (32 mu W) of input power while delivering 3.2 V to a 1 M load. At a remarkably low input power of -20.5 dBm (8.9 mu W) for a 1 M Omega load, the rectifier produces an output voltage of 1 V.